Paint-making machinery



Sept. 25 1923.

J. W. KENT PAINT MAKING MACHINERY Filed Nov. 19, 1921 fgwvemfoz K/l/MWM /W 33%; 1M Gwen m m zdyzm w Patented sent. 2?, 1%23.

JAMES W. KENT, OF BROOKLYTJ; E'EEf YOR- rAinr-rreirrne Application filed Hot/ember 19,1921. Serial No; 518.32%.

'machinery. More particularly the invention relates to the machines known as color mills for grinding. or mixing paints. The object of theinvention' is, to provide certain improvements in the scraper or cleaning means employed for scraping the paint of? the grinding stone. 7

In the following specification the invention is fully described in all itsdetails, while the. novelfeatures are pointed out in the claims. In thedrawing illustrating the invention- Fig. 1 is a perspective view of a typicai. color mill equipped with-a scraper embody ing the inventiomrertain parts not neces sary. for understanding the inven ion have been omitted and parts are broken away.

Fig. 2 is a partial plan View illustrating the scraper.

Fig. 3 is a view in elevation looking in the direction of arrow 3 in Figure 2.

Fig. 4 is a view of'the scraper at right angles to Figure 3.

Referring to Figure 1 the reference numeral 5 denotes in general the framework of a color mill, in which the upper stone 6 is held stationary and. the lower stone 7 rotates. The paint mixture is contained within the upper stone at 8 and as the lower stone rotates, the paint is ground between the stones and flows out through the annula r flat opening between the stones at 9 and down upon the flange 10 of the framework which contains and moves with the lower stone. From the flange 10 the paint is scraped off and flows into the final paint receptacles. The numeral 11 denotes means for adjusting the opening 9, which is done by raising or lowering the lower stone.

All of the foregoing is well known in the art and requires no further description or illustration. 7

Heretofore it has been customary to employ a scraper adapted to bear against the annular surfaces 12 and 13 of the stones and also against the upper surface of the flange 10 in order to scrape the paint oil and cause it to flow intothe final rece ptscles, not shown. Such scrapers are in he blade-adapted to 13 and theblade is'cutz o t flange 10. The scraper is arried iv a secured to the frame. it f t flange 10 moves verticaliy. the scraper bla is bent or sprung out of such scrapers become twisted and useless.

The invention airns specifically to overcome the above named objections; and to provide a novel and generally improve-t sore-pen 1 To this end there secured to the fixer 1 i f *arnework 5 insuitable position;'abracket"' 15 having a bore for receivingthe cylin drical v ter is provided with an i groove 18 whereby. the steinnir be con iently held in'lateral adj ustedposition by Y The scraper stem 17 is 'squaredfbelow the bracket 15 The numeral 20 denotes the scraper blade which is adapted tobear against the aforesaid stonesurfaces 12 and 13 and which blade is further out outas at 21 to straddle the flange 10. The scraper blade is secured to ascraper holder 22 which has two bosses 23 and 24- r'otat'ably carried on the scraper stem 17 inthat the apertures 25 in said bosses are cylindrical and the stem passes through them as shown.

The scraper is pressed against the-stones by a scraper spring 26 which .is secured to a spring holder 27 carried bythe stem 17 between the bosses 23 and 24; aforesaid. The blade holder 22 is cut away as 28 to perniit the spring to act. The spring holder is carried by the stem 17 in non-rotatable relationship, the spring holder having a. squared hole 29 to receive the stem. 7

It will be seen, therefore, that the scraper blade is supported vertically on the flange 10 and not on the stem 1'2. Were the flange turning the stem 17 until proper adjustment has been obtained, after which; the

end 16 of a scraper stem 17 "The lat V ollows from .i e foregoing brief description. that when t e -lower stone is adjusted and whereby true and in tine Ufa low

- set screw 19 is tightened to maintain the stem and scraper in adjusted position.

its form. On the other hand, it is quite important that the scraper is kept against the stone surfaces 12- and 13 under spring tension, because of the unevenness of said surfaces, it being practically impossible to form them as true circles.

The scraping mechanism as herein disclosed is easy to manufacture, assemble, affix and operate and adjust.

While I have disclosed the invention in the preferred form, I do not wish to be limited to the disclosure otherwise than as required by the appended claims.

I claim 1. The combination with a color mill having a fixed stone and a vertically movable stone for grinding the colors, a scraper for said stones, means for supporting said scraper in relatively fixed lateral relationship to the said stones, said means permitting automatic vertical movement of the said scraper imultaneously with a vertical movement by said movable stone.

2. The combination with a color mill hav ing an upper fixed stone and a lower rotatable and vertically adjustable stone for grinding the colors, of a scraper, means for supporting said scraper in'relatively fixed lateral relationship to the said stones, and means for mounting said scraper on said supporting means to permit said scraper to maintain operative relationship with said lower stone by gravity. 4

The combination with a color mill havinn: a fixed upper and a rotatable and vertically movable lower stones for grinding the colors, of a scraper for said stones comprising supporting means secured to said mill, a scraper slidably carried by said supporting means in vertically fixed position with re-' spect to said lower stone and means for yieldingly maintaining said scraper in contact with the said stones.

4. A scraper for color mills of the character described comprising a scraper blade, a'

said scraper blade when the grinding stones in the said mill are adjusted and means for regulating the tension of the said spring.

JAMES W. KENT. 

